LA5 marksYear: 2025MediumCBSE Class 10
quadratic-equationsfractionscross-multiplication
Question
Express the equation x−3x−2+x−5x−4=310; (x=3,5) as a quadratic equation in standard form. Hence, find the roots of the equation so formed.
Solution
1
x−3x−2+x−5x−4=310
⇒(x−3)(x−5)(x−2)(x−5)+(x−4)(x−3)=310
+1.5 marks2
Simplifying, we get 2x2−19x+42=0
+1.5 marks3
⇒(x−6)(2x−7)=0
⇒x=6 or x=27
+2 marks